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Terms and Vocabulary

completion

заканчивание скважины

produce (v)

добывать

cased-hole completion

заканчивание скважины посредством обсадной колонны

perforation

перфорационное отверстие

production zone

продуктивная зона

production tubing

эксплутационная насосно-компрессорная колонна

hole completion

заканчивание скважины

gravel pack

гравийный фильтр

screen

фильтр

formation sand

песок из пласта

production tubular

эксплутационная колонна

washout

размыв, отверстие в бурильной трубе

unconsolidated sand

неуплотненный песок

fracturing fluid

жидкость для гидроразрыва

reservoir rock

порода-коллектор

reservoir section

коллекторская порода

leak

утечка, течь

redundant

излишний, избыточный, резервный

depleted field

истощенное месторождение

producing well

добывающая скважина

permeability

проницаемость

artificial lift methods

методы механизированной добычи

secondary recovery

вторичное извлечение

Production

The production stage is the most important stage of a well's life, when the oil and gas are produced. By this time, the oil rigs and workover rigs used to drill and complete the well have moved off the wellbore, and the top is usually outfitted with a collection of valves called a "Christmas Tree". These valves regulate pressures, control flows, and allow access to the wellbore in case further completion work needs to be performed. From the outlet valve of the Christmas Tree, the flow can be connected to a distribution network of pipelines and tanks to supply the product to refineries, natural gas compressor stations, or oil export terminals.

As long as the pressure in the reservoir remains high enough, the Christmas Tree is all that is required to produce the well. If the pressure depletes and it is considered economically viable, an artificial lift method mentioned in the completions section can be employed.

Workovers are often necessary in older wells, which may need smaller diameter tubing, scale or paraffin removal, repeated acid matrix jobs, or even completing new zones of interest in a shallower reservoir. Such remedial work can be performed using workover rigs – also known as pulling units – to pull and replace tubing, or by the use of a well intervention technique called coiled tubing.

Enhanced recovery methods such as waterflooding, steam flooding, or CO2 flooding may be used to increase reservoir pressure and provide a "sweep" effect to push hydrocarbons out of the reservoir. Such methods require the use of injection wells, and are used when facing problems with reservoir pressure depletion, high oil viscosity, or can even be employed early in a field's life; in certain cases – depending on the reservoir's geomechanics – reservoir engineers may determine that ultimate recoverable oil may be increased by applying a waterflooding strategy early in the field's development rather than later. The application of such enhanced recovery techniques is often termed as "tertiary recovery" in the industry.

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